peters



(Model) 2 Sheets-Sheet 1.

A. A. WOOD.

Gin Saw Filing Machine. No. 232,321. I Patented Sept. 14,1880.

W n E 1 n z- 2 Sheets-Sheet 2.

Patented.Sept.14 ,188Q.

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A A WOOD Gin Saw Filing Machine.

(ModeL) N.FETF.RS, FHOYO-LI'MOGRAPNER. WASHINGTONv D, C.

UNITED STATES PATENT OFFICE.

ALBERT A. WOOD, OF ATLANTA, GEORGIA.

GIN-SAW -FILING MACHINE.

SPECIFICATION forming part of Letters Patent No. 232,321, datedSeptember 14, 1880.

Application filed May 3, 1880.

To all whom it may concern:

Be it known that I, ALBERT A. IVOOD, a citizen of the United States,residing at Atlanta, in the county of Fulton and State of Georgia, haveinvented certain new and useful Improvements in Machines for Filing GinSaws 5 and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to letters or figures ofreference marked thereon, which form a part of this specification.

This invention relates to an improvementin that class of machines usedfor sharpening the teeth of gin-saws without removing them from theshaft or arbor uponwhich theyare secured when in use.

The object of my invention is to give to the files which point thesaw-teeth both reciproeating and semi-rotary motions, thereby formingwhat may be termed needle-points to the teeth of the saw, which is movedor fed to the files by being steadily but slowly rotated upon its axisinstead of by the intermittent feed heretofore used for such purposes.The resultis a better and stronger point to each tooth than can beproduced by other machines now used, it being fullyequal to thatproduced by the best hand-work in shape and strength, but far superiorto it, as the machine imparts regularity to the teeth of all the saws011 an arbor. I

The invention consists in the construction and arrangement of theseveral parts of the machine, as will be hereinafter fully described,and then specifically pointed out in the claims.

In the drawings, Figure l is a plan view of the machine with a series ofsaws upon their arbor in proper position for the files to act upon theirteeth. Fig. 2 is a side view with the files in position for work. Fig. 3is a View of the opposite side of the machine from that shown in Fig. 2,the files and their operating mechanism being turned back from the saws.Fig. 4. is a transverse section, showing the means for operating thefeeding-gear. Fig.5 is a bottom plan of the frame of the machine,illustratin g the means of attaching the file-operating mechanism to thebed and adjusting said means relatively to each other. Fig. 6 is a in gthe saws to be operated upon.

(ModeL) section through the line a" m, Fig. 2. Fig. 7 is a sectionthrough 3 y, Fig. 1; and Fig. 8 is a detail view of the under surface ofthe pressure and feed rolls with their operating-shafts.

The bed of the machine consists of a bar, A, which may be of either woodor metal, and is of such length that when once in position the operatingparts may be moved along it to file all the saws upon an arbor. Uponthis bar A are adjustably secured the stands or supports B by means ofthe set-screws a, which pass through an angle of the clips B on the rearends of the stands and bear against a wearin g-plate, a, Fig. 3, whichis formed to fit one angle of the bar, as shown in the drawings. By thismeans the supports 13 maybe adjusted as required to the length of thearbor hold- These supports B are each provided with feet a and with abifurcated or V-shaped upward projection, a in the bifurcation of whichthe arbor carrying the saws is placed. The angular shape of the forksallows the bearings of the arbor to rest and rotate steadily therein, nomatter what their diameter may be.

Secured in any desired position upon the bar A by means of the clip Aand set-screw a is the slotted bed A, provided upon its upper side witha seat for the reception of the adjustable bed-plate O, which is heldthereon by the screws (1, a passing through slots in the opposite endsof the bed and bed-plate, thus allowing a longitudinal adjustment of thebed-plate upon the bed A.

. The rear end of the bed-plate is provided with two upwardlyprojectingears, b b, to which is hinged the frame D by means of the downwardly-projecting ears I) I), attached to its lower side. This frame Dcarries the operative parts of the machine, which consist of thedriving-gear E, mounted upon a stud,

b projecting from the rear of the frame, and

which is provided with the hand-crank E or other suitable means ofrotation. This gear E imparts rotation to the pinion E mounted upon oneend of the shaft F, which revolves in suitable bearings formed in theframe, and has attached to the end opposite the pinion a crank, F, whichcarries one end of the connectingrod G, the opposite end of which ispivoted to the cross-head G.

Two vertical projections upon the cross-head move between ways 0 c ofthe frame, thus preserving a straight longitudinal movement of thecross-head in its reciprocations. To a projection on each side of thecross-head is pivoted a carrier, H, through suitable orifices in whichpass the extended arms of the file-holders I I, which are adjustablysecured in the carriers by the set-screws c 0. These file-holdersreciprocate in bearings formed in the lugs (1 cl at their rear ends,while their opposite ends are carried in the spring-ac'ljusted bearingsd d, pivoted to the front of the frame D. Each file-holder has anenlargement at its front end pierced by a triangular orifice, whichforms a socket for the reception of the files, and in which they areheld by the set-screws c 0 It will be observed that the springs 01 01attached to the bearings d (1, allow a certain amount of lateralmovement to the file-holders, thus causing the files to act upon theteeth of the saw with yielding pressure.

At each forward movement of the cross-head G the carriers H, pivoted toeach side thereof and attached to the converging file-holders I, arebrought nearer together, thus giving them a partial rotation at eachreciprocation, the two motions enabling the files to produce the roundedneedle-point upon the saw-teeth,which has been found to be the mostdesirable.

In order to feed the saw regularly forward, aworm, K, is placed upon thecrank-shaft F, which gears with a worm'wheel K, placed upon the rear endof a feed-shaft, L, revolving in bearings attached to the frame D, andhaving an endwise movement therein to allow the feed-rolls to beadjusted to or from the saw-center. The front end of this shaft L isprovided with the slightly-conical rubber feedroll 6, which, when themachine is adjusted for use, bears against one side of the saw beingoperated upon.

The pressure of the saw against the feed-roll e is regulated by thepressure-roll e, mounted upon the eccentric-shaft L, the bearing ofwhich and the front end bearing of the feedroil shaft L are formed inthe projection D of the frame D.

In order to hold the eccentric-shaft L in place after it has been turnedto adjust the pressure-roll c with reference to the thickness of the sawbeing operated upon, a set-screw, 0 is provided, the end of which may bebrought firmly in contact with the shaft L, holding the latter in anydesired position.

It will be observed that these feeding devices impart a steady rotarymotion to the saws, the flexibility of the connections of thefile-carriers with the cross-head allowing the files to adjustthemselves to each tooth for a sufficient length of time to give it therequired point. 7

An adj usting-screw, J, provided with a jamnut, 0 passes through thebed-plate G and bears against the front end, D, of the frame D, thusallowing the latter, together with the files and feed mechanism mountedthereon, to

be adjusted to any desired angle with the radius of the saw.

The method of using this machine in the sharpening of gin-saws is asfollows The sawarbor, with all its saws in position upon it, is takenout of the gin and placed with its journals in the V-shaped supports,which are put at such a distance from each other upon the bar A as toreceive them. The frame D, with the operative parts of themechanism, israised, turning upon the pivots or hinges, by which it is connected withthe bed-plate C, until the files and feeding devices are high enough toclear the saws. The bed A is then moved along the bar A until it isexactly opposite the saw to be filed, when the frame D is lowered intoposition with the feed-rolls on either side of the saw. The distancefrom the center of the saw at which these rolls bear causes itsperiphery to travel faster or slower, as may be desired, to suit coarseor fine teeth,or to allow the files a longer or shorter period foraction upon each tooth. The proper angle is then given to the files bymeans of the adjustingscrew J. The bed-plate O is now adjustedlongitudinally until the files are in such position that their pointswill not become disengaged from the saw in their backward reciprocation,nor the ends of the file-holders come in contact therewith in theirforward movement; and, finally, the bed-plate O and frame D,with itsoperative parts, are secured in place upon the bed A by the screws to a.The pressure-roll upon the eccentric-shaft L is then brought intocontact with the side of the saw opposite the feed-roll with sufficientforce to give the latter the frictional contact with the saw needed tocause the saw to revolve steadily when the feed-roll is rotated. Powerbeing new applied to the crank, or the wheel E rotated by other means,the files will commence their semi rotary reciprocating movements,acting upon the teeth of the saw, which is steadily revolved by the feedmechanism, one after another, until all are brought to the desiredpoint, when the operative mechanism is released from that saw and movedalong the bar into position for operation upon the next saw, and so onuntil all the saws upon the arher have attained the proper degree ofsharp ness.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent, the following:

1. In a machine for filing gin-saws,the frame D, provided with lugs orbearings dd, crankshaftF, connecting-rod Gr, cross-head G hingedcarriers H, and file-holders I I, in combination with the revolvingfeed-shaft L, having conical elastic feed-roll c, and theeccentric-shaft L, having conical pressure-roll c, substantially as andfor the purposes set forth.

2. In a machine for filing gin-saws, the combination of the bar A,transversely-adjustable supports B, having clips B and arbor-stands aand the transversely-adjustable bed A,

having clip A, with the longitudinally-adjustable slotted bed 0 andadjustable hinged frame D, substantially as described.

3. In a machine for filing gin-saws,the ad- 5 justable frame D, carryingthe driving-gear E upon the stud b and provided with the lugs cl andspring-adjusted bearings d, in combination with the pinion E upon thecrank-shaft F, connecting-rod Gr, cross-head G, hinged carriers H, andfile-holders I I, all constructed and arranged substantially as shownand described, for the purpose of imparting a reciprocating andpartially-rotating movement to the files.

4. In a gin-saw-filing machine, the adjustable frame D D and crank-shaftF, carrying the worm K, in combination with the feedshaft L, carryingthe worm-wheel K and conical elastic feed-roll e, and theeccentric-shaft L, having conical pressure-roll c, all constructed andarranged as shown, for the purpose of giving a steady feed to the saw,substantially as specified.

5. The combination of the frame D, provided with bearings'd d,located asdescribed, crosshead G, means for reciprocating said crosshead, hingedcarriers H, and file-holders I, substantially as specified.

6. A frame provided with bearings cl d, in combination with areciprocating crosshead, suitable carriers hinged thereto, andfile-holders attached to the carriers, whereby the files are caused toboth reciprocate and semi-rotate, substantially as described.

7. The combination, with a frame having bearing-lugs, as described, of areciprocating cross-head, carriers hinged thereto, file-holders attachedto the carriers, and suitable mechanism for continuously rotating thegin-saw, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALBERT A. W'OOD.

Witnesses:

J. W. MEAKIN, B. F. SAWYER.

